Look closely and you'll see a painting in the artist's studio that was used fifteen years earlier in Dead Man's Mirror (1993).
The title of Ariadne Oliver's most recent novel mentioned in this episode, "Lady, Don't Fall Backwards", is named after the fictional detective novel at the heart of the plot of The Missing Page (1960), an episode of the British TV comedy "Hancock's Half Hour".
In November 2013 an 'homage' book of the same name was published by Skerratt Media, under the name of a fictional author "Darcy Sarto".
In November 2013 an 'homage' book of the same name was published by Skerratt Media, under the name of a fictional author "Darcy Sarto".